Centrifugal pump



June 16, 1953 c. J. BERGH 2,642,004

CENTRIFUGAL PUMP Filed Dec. 21, 1950 s sheet -shee 1 INVENTOR CHARLES J. BERGH ATTO R N EYS June 16, 1953 c. J. BERGH CENTRIFUGAL PUMP 3 Sheets-Shem- 2 Filed Dec. 21 1950 INVENTOR CHARLES J. BERGH BY Mam ATTORNEYS.

June 16, 1953 c. J. BERGH CENTRIFUGAL PUMP 3 Sheets-shea 3 Filed Dec. 21, 1950 INVENTOR CHARLES J. BERGH ATTORNEYS Patented June 16, 1953 CENTRIFUGAL PUMP Charles J. Bergh, Vandalia, Ohio, assignor to The Dayton Pump & Mfg. 00., Dayton, Ohio, a corporation of Ohio Application December 21, 1950, Serial No. 202,106

4 Claims.

This invention relates to centrifugal pumps for delivery of liquids under pressure.

An object of the invention is to provide a simplified pump structure that is more easily assembled and which is directly connected with the driving motor for the pump.

Another object of the invention is to provide a centrifugal pump wherein a .pump body is constructed and arranged in such a manner that it iscapable of receiving pump parts of different size whereby to produce a pump having difierent capacities.

Still another object of the invention is to provide a centrifugal pump in accordance with the foregoing object wherein there is provided a removable volute member that. can be replaced by volutemembers of other size and cooperating impellers whereby pumps of different capacity can be obtained utilizing a single basic pump body.

Still another object of the invention is to provide an improved construction of a centrifugal foregoing objects wherein a part of the pump body forms a part'of the housing for the electric motor that drives the pump.

Another object of the invention is to provide a centrifugal pump I in which the movement of liquid through the pump removes air from the pressure chamber of the pump to prevent the same from becoming air bound, the liquid stream having a. suction or Venturi action in drawing air from the pressure chamber into the stream discharging from the pump body.

It is another object of the invention to provide a centrifugal pump having, a continuous prime.

Further objects: and advantages will become apparent from the drawings and the following description. a

In the drawings:

Figure l is a side elevational'view with the pump body broken away and with the pump shown in cross-section along line I-lof Figure 2, the pump incorporating features of this invention.

Figure 2. is a cross-sectionalview taken along line 2-2 of Figure 1.

Figure 3 is a: cross-sectional view taken along line 33 of Figure 1.

2 Figure 4 is a cross-sectional View taken along line 44 of Figure 1.

Figure 5 is a side elevational view of the removable volute member of the pump.

Figure 6 is a plan view of the removable volute member for the pump.

Figure '7 is a perspective view illustrating the assembly of the removable volute. and impeller within the pump.

Figure 8 is a cross-sectional view line 88 of Figure 1.

In this invention the pump body 12 is mounted on a base It by means of bolts 50, the base [0 in turn being supported upon a bed H, which may be a concrete foundation.

The base H) supports the pump body [2 which is in the general form of a cylindrical casing closed at one end by a wall l3. The opposite wall of the pump body l2 consists of a closure plate [5 that is secured to the body I2 by means of bolts I l. The closure plate l5 has a wall 5| that projects from the plate l5 and is arranged substantially in the form 01 a cylinder, thereby providing a chamber 52. The wall 53 closes one end of the chamber 52, and also thereby closes the pump body I2. This wall 53 forms one end Wall of the housing It comprising a part of the electric motor, the wall 53 being secured to the housing It by suitable bolts.

The motor I6 drives a shaft I! that extends through the closure wall 53.

Within the pump body [2 there is a pump taken alon housing l8 defined by a wall l9 projecting inwardly of the pump body from the wall l3 forming a cylindrical portion. From the wall portion IS, the wall flares radially outwardly in av substantially radial wall portion 2| extending toward the side wall of the pump body I2, this wall portion 2i turning into parallel spaced relation with the casing asa second cylindrical portion 22, and finally merging with the iii-turned portion 23 constituting a flange on the inner end of the body l2. The housing l8 has radially disposed protuberances 24, some of which are joined to the pump body l2, which receive the bolts 14 by which the body I2 is attached to the closure plate l5. The pump body 12 and. the pump housing is thereby define a pressure chamber 25.

The pump housing l8 forms a substantially cylindrical chamber 5i! that receives. a removable volute member 2.6.

The removable volute member 26 is more particularly illustrated in Figures 5 and 6 and consists of a radially disposed plate 55 that has an axial opening 56 therein. Around the opening 56 there isprovided a wall 28 that defines a pressure chamber 29. The wall 28 of the volute 26 forms a tangentially disposed outlet passage El from the pressure chamber 29 that curves to a radial discharge opening 57a. The wall 28 is also provided with flange portions 58 on opposite sides of the discharge opening 51a that engage the wall portion 22 on opposite sides of the discharge outlet 59 provided in the wall 22 of the pump housing [3, thus effectively sealing liquid from discharge between the flanges 58 and the wall 22.

The wall 28 of the volute member 25 engages the wall portion 2! of the pump housing It and cooperates therewith to form the pressure cham ber 29, the fluid is delivered through the passage 5'! and thence through the opening 57a and through the discharge outlet 59 into the discharge pipe 52. The wall 22 being spaced a short distance from the pump body wall l3 provides an open passage 25a in the chamber 25 across which fluid flows from the discharge outlet 59 to the discharge pipe 42, The discharge pipe 42 being in substantially linear alignment direct flow relationship with the discharge outlet 59 and opening 51a and generally of larger size than the discharge opening 51a provides for a straight .through flow of fluid from the opening 51a to the pipe 42.

The fluid crossing the passage 25acommunicates with the pressure chamber 25 and fills the .same with fluid. Also, since the discharge pipe 42 is in direct alignment with the opening 57a, and is placed at the top of the chamber 25, the liquid flowing over the open passage 25a produces a suction or Venturi action between the outlet 58 and the pipe 22 which draws from the chamber 25 any air that tends to collect in the top of the chamber 25 and discharges the air through the pipe 32 with the liquid therein. The

chamber 25 is therefore permitted to fill ccmpletely with liquid so that a continuous prime is provided for the impeller and the possibility of the chamber 25 becoming air bound is removed. Liquid in the chamber 52 is also a part of the active system to provide a continuous prime for the impeller.

The eye opening 33 of the impeller is defined by a spindle portion 36 rotatable in a bearing 37 carried in the cylindrical Wall portion [9 of the pump housing I8.

The removable volute member 26 has the radial wall 55 thereof positioned with the periphcry of the wall in engagement with the inner periphery of the wall 22 of the pump housing l8,

coaxial with the cylindrical portion iii of the pump housing l8. Radial flanges E2 on the volute member 26 aid in proper location of the volute member in the chamber 54.

The volute member 26 is also provided with an annular protuberance 65 that engages a cooperating annular protuberance 66 on the closure position in the chamber E l by the closure plate 55 and the chamber 52 is thereby effectively sealed from the pressure chamber 25. A second annular protuberance B7 on the closure plate 15 engages the inner periphery of the flanged wall portion 23 for coaxial location of the closure member if: relative to the axis of the pump housing iii. A pin Iii extends between the closure plate l5 and the removable volute member 26 to retain the volute member in position with the passage 51 in alignment with the opening 59, and to prevent rotation of the volute member Within the chamber 5 for assembly 01" the pump structure.

A seal member 76 is provided around the drive shaft ll and consists of a stationary seal element H placed in the wall 53 of the closure plate It and a running seal element 12 that is urged against the stationary member H by a spring l3. Thus, liquid in the chamber 52 is prevented entry into the housing of the motor l6. 1

Fluid is admitted to the pump through the inlet opening 35 provided in the end wall it of the pump body l2, the opening 33 being aligned with the cylindrical wall portion 19 of the pump housing and the eye 33 of the impeller 32. Discharge from the impeller flows through the passage 5! into the registering discharge outlet 59 in the wall 22 and thence across the narrow intervening part of the chamber 25 to the radial opening 4% in the pump body !2 and into the discharge pipe 22 as heretofore described, fluid within the chamber 25 providing a continuous prime for the impeller.

It may be desirable at times to use the centrifugal pump in combination with a jet booster. For this purpose the end wall iii of the pump body l2 is provided with an opening 44 that may be connected with a pipe for delivery of fluid under pressure from the chamber 25 to a jet booster placed within a well.

The centrifugal pump of this invention is constructed in such a manner that a complete series of pumps of different capacities can be obtained, utilizing the single pump body i2 and the closure plate l5 as the basic elements. It will be noted that the wall 28 of the removable volute member 26 is placed radially inwardly of the outer periphery of the flanged wall 55 of the volute 25. With an impeller 32 of proper size placed within the pressure chamber 29 formed by the wall 23, a pump of given capacity is produced, the size of the impeller governing the pumping capacity.

Merely by removing the volute 25 and the impeller 32 of the pump of Fig. 1 and replacing the same with another volute in which the wall 28 thereof is placed closer to the outer periphery of the flanged wall 55 and another impeller of larger size to cooperate with the enlarged pressure chamber formed by the radially outward position of the wall 28, a pump of increased capacity can be made. It will of course be understood that as the pump capacity is increased, motor horsepower should also be increased accordingly.

The construction of the centrifugal pump of this invention, therefore, permits a manufacturer to produce the two major components of the pump, comprising the pump body i2 andthe closure plate 15 as standard elements and to ofier the consumer pumps of different capacities merely by changing the volute 26 and the impeller 32.

In fact, after a pump has been delivered to a plate 15 whereby the volute member 26 is held in 15 customer, and the customer desires greater age-42 ,004

s V pumpihg' capacity, he is in a positionto obtain the same merely by purchasingfrom the manufacturer a volute 26 and an impeller 32' ofm creased size that he can place in the pump body, thus saving the expense that would be required to purchase a completely new pump.

The chamber 52 in which the seal 1:0 is located is in open communication with the pressure chamber 29 of the volute 2:6 through: the opening 56' through which the impeller 32- is installed into the pump housing l8. Thus, the chamber 52 will be filled with: fluid that is being pumped, but since the fiuidis discharged generally radially outwardl of the impeller 32, the fluid irithe chamber 52 be more or less quiescent; Thus, any foreign particles that enter the chamber 52 can settle to the bottom of the chamber rather than collecting on the seal I0, thus greatly prolonging the life of the seal member.

While the apparatus disclosed and described herein illustrates a preferred form of the invention, yet it will be understood that mechanical alterations can be made without departing from the spirit of the invention, and that those modifications that fall within the scope of the appended claims are intended to be included herein.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. An impeller pump, comprising, a hollow pump body of generally tubular shape and having a closure wall at one end thereof transverse of the axis of the pump body, a second wall interiorly of said body having a first portion generally transverse of the axis of said body and a second portion generally axial of the axis of said body and connecting with said body and forming a pumping chamber within said body open at one side thereof, a discharge opening at the top of said pump body, said second portion also having a discharge opening in alignment with said first mentioned discharge opening to permit fluid flow therebetween, a volute member having a first wall portion lying in a plane disposed radially of the axis of the member and a second volute wall portion around the axis of the member and perpendicular to said frame, said volute member being removably positioned in said pumping chamber with the radial wall thereof engaging said pumping chamber wall to axially position the volute member in the pumping chamber and with the second volute 'wall portion engaging the pumping chamber wall to form therewith a volute chamber within said pumping chamber of smaller cross-sectional area than said pumping chamber, an impeller within said volute chamber, and a closure wall on said body enclosing said volute member within said pumping chamber.

2. An impeller pump, comprising, a hollow pump body of generally tubular shape and having a closure wall at one end thereof transverse of the axis of the pump body, a second wall interiorly of said body having a first portion generally transverse of the axis of said body and a second portion generally axial of the axis of said body and connecting with said body and forming a pumping chamber within said body open at one side thereof and partitioning said body to form a pressure chamber therein, a discharge opening at the top of said pressure chamber, said axially arranged portion of said second wall being spaced from said discharge opening and having a discharge opening therein in substan- V, 6 tial linear alignment with the first mentioned discharge opening" but spaced therefrom for flow of liquid between the said discharge openings across a portion of said pressure chamber at the topportion thereof, a volutemember having a wall portion generally radial of the axis of the member and a second volute wall portion around the axis of til-remember, said volute member bein removably positioned in said pumping chamber with the radial wall thereof engaging said pumping chamber wall to axially position the volute member in the pumping chamber and with the volute wall portion engaging the pumping chamber wall to form therewith a volute chamber within said pumping chamber of smaller crosssectional area than said pumping chamber, an

3. An impeller pump, comprising, a hollow pump body of generally tubular shape and having a closure wall at one end thereof transverse of the axis of the pump body, a second wall interiorly of said body having a first portion generally transverse of the axis of said body and a second portion generally axial of the axis of said body and connecting with said body and forming a pumping chamber within said body open at one side thereof, a discharge opening at the top of said pump body, said second portion also having a discharge opening'in alignment with said first mentioned discharge opening to permit fluid flow therebetween, a volute member having a wall portion generally radial of the axis of the volute and having an opening therein through which to receive an impeller and having a second volute wall portion around the axis of the member, said volute member being removably positioned in said pumping chamber with the radial wall thereof engaging said pumping chamber to axially position the volute member in the pumping chamber and with the volute wall portion engaging the pumping chamber wall to form therewith a volute chamber within said pumping chamber of smaller cross-sectional area than said pumping chamber, an impeller within said volute chamber positioned therein through said opening in said radial wall of said volute member, a closure wall on said body enclosing said volute member within said pumping chamber and forming an axially arranged chamber adjacent the opening in said volute member and a shaft seal structure in said last mentioned chamber between said impeller and a wall of said last mentioned chamber.

4. An impeller pump, comprising, a hollow pump body of generally tubular shape and having a closure wall at one end thereof transverse of the axis of the pump body, a second wall interiorly of said body having a first portion generally transverse of the axis of said body and a second portion generally axial of the axis of said body forming generally a tubular structure connecting said first portion with said closure wall axial of said body and forming a fluid passage and a third portion at the opposite side of said first portion and connecting with said body and forming a pumping chamber within said body open at one side thereof, said second wall partitioning said body to form a pressure chamber therein with said third portion having a discharge opening connecting with said pressure chamber, means forming a. discharge opening from said pressure chamber, a 'volute member having a wall portion radial of the axis of the volute member and a second volute wall portion around the axis thereof, said volute member being removably positioned in said pumping chamber with the radial wall thereof engaging said pumping chamber wall to axially position the volute member in the pumping chamber and with the volute wall portion engaging the pumping chamber wall to form therewith a volute chamber within said pumping chamber of smaller cross-sectional area than said pumping chamber, an impeller within said volute chamber having an axially extending portion positioned within said second portion of said second wall for flow of liquid to said impeller, and a closure ReferencesCited in the fileof this patent UNITED STATES PATENTS Number within said pumping chamber.

CHARLES J. BERGH.

Name Date Rupp Mar. 9, 1943 Mann May 8, 1945 Mueller Feb. 12, 1946 Mann Nov. 4, 1947 Howard Sept. 28, 1948 Burks Jan. 25, 1949 Mueller July 26, 1949 Piccardo Aug. 16, 1949 Conery Oct. 10, 1950 FOREIGN PATENTS Country Date Germany Apr. 30, 1926 

